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AI illustration of adult Panaque nigrolineatus in left-facing side view; not a photograph.

Royal pleco

Panaque nigrolineatus

Red-orange eyes and lengthwise dark lines belong to a pleco that needs substantial permanent space.

Adult length
Up to 43 cm (standard length, without the tail fin)
Water temperature
23–29 °C
Lifespan
10–15 years
pH
6–7.5
Hardness
2–15 dGH
Natural habitat
Native to the Orinoco basin and southern tributaries of the middle and lower Amazon.
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Appearance and identification

A broad head and heavy body carry longitudinal stripes. Similar royal-pleco trade forms need identification beyond eye colour and striping.

Aquarium environment

Body size, wood and waste limit delicate planting layouts.

Diet and feeding

Offer suitable wood to rasp plus plant matter and complete sinking foods; wood alone is not a balanced diet.

Same-species behaviour

Provide large housing, wood and filtration for substantial waste. Daytime shelter and nocturnal foraging should shape the layout.

Sources

www.fishbase.se ↗ 2026-10-25

www.scotcat.com ↗ 2026-10-22

PeekFish · Ornamental fish

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